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Vulnerability Note VU#408419OpenSSH contains a one-off overflow of an array in the channel handling codeOverviewOpenSSH is a program used to provide secure connection and communications between client and servers. Channels are used to segregate differing traffic between the client and the server.I. DescriptionOpenSSH versions 2.0 - 3.0.2 contain a one-off overflow of an array in the code that handles channels. For an attack against the server, the attacker must be able to authenticate to the system in order to exploit this vulnerability. For an attack against the client, the client must connect to a malicious server.II. ImpactAn attacker is able to execute arbitrary code with the privileges of the sshd process on the server. The sshd process usually runs as root/superuser. A malicious server is able to execute arbitrary code on the vulnerable client's machine with the privileges of the current user.III. SolutionUpgrade to OpenSSH version 3.1.Systems Affected
References
This vulnerability was discovered by Joost Pol <joost@pine.nl>. This document was written by Jason Rafail.
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